Tutorials
H3 as a single-image edit model
Minimax H3 can be used as an image-editing model if we generate a single frame. Here are some collages based on AI-generated references with workflows. Each edit takes about 8 secs on a RTX 5090. The
Minimax H3 can be used as an image-editing model if we generate a single frame. Here are some collages based on AI-generated references with workflows. Each edit takes about 8 secs on a RTX 5090. The tasks include changing outfits, body types, locations, ages, and camera angles; creating character sheets and storyboards; stylization; and reposing characters based on depth maps. I did not try to cherrypick the best-looking results. There were some posts (1, 2) about that here -- but given the community progress this week, might be nice to see what can be done now. My setup is as follows: Checkpoint: https://huggingface.co/smhfacct/Minimax-H3-fl2va-ref2va-hybrid-models/blob/main/minimax_h3_hybrid_fl2va_ref2va_b25-49.safetensors Ref2VA models apparently have worse image quality than FL2VA models, while FL2VA models are apparently weaker at handling reference images. As I understand it, this checkpoint tries to combine the strengths of both. Video VAE: a special VAE for rendering single images. https://huggingface.co/Mamad8/MiniMax-H3-Image-VAE/tree/main If you do not use this VAE—for example, if you use the regular VAE, create a 5-frame video, and pick out one frame—the images tend to come out blurry. For this approach to work best, it might also be a good idea to monkey-patch comfy_extras/nodes_minimax_h3.py, because ComfyUI currently does not allow you to generate fewer than 5 frames. If you simply pick the first frame out of 5, the new VAE produces grid artifacts. (It doesn't do this when generating just 1 frame.) Here's a link to my version of the patched file, based on the most recent ComfyUI version. The only changes remove the frame limit. Of course, changing it this way is not ideal, but I feel it's the quickest way to work around the issue. LoRAs: I found that Mamad8's ThisIsFine LoRA helps with details, but YMMV: https://huggingface.co/Mamad8/MaxiMin-HHH-R2V-ThisIsFine For the Turbo LoRA, I use: https://huggingface.co/lightx2v/Minimax-h3-Turbo/blob/main/minimax_h3_fl2v_turbo_8step_v1.0_comfyui_bf16.safetensors Sampling settings: ComfyUI 0.32 with Comfy Kitchen attention, sa_solver/simple, 8 steps, CFG 1. Example ComfyUI workflow: https://pastebin.com/bV5KPzjD Speed depends on the reference image size. I use an RTX 5090 on RunPod, and in most cases, a 1920×1088 image is generated in about 8 seconds. --- My previous go-to was Krea 2 + Identity LoRA 1.2, which is amazing. Yet I feel that Minimax outperforms it in many respects. We get better character fidelity, better handling of 3D scenes, better mirrors, and more interesting compositions. Also feels better than using e. g. QIE or Klein 9b. There is certainly still room for improvement, and I wonder what you think about it. UPD: posted the prompts for each image here https://pastebin.com/ngXR9byq submitted by /u/Patient_Ratio4177 [link] [comments]
Source: r/StableDiffusion | 2026-08-14